Dear Mr.Smith,

   Thank you for being an amzing teacher. i have never had such a great teacher in all my years of going to school. i have remembered everything that you taught and ive never experienced a feeling of having total satisfaction of walking out of a class knowing what i learned and comprehended. So i take this time now to thank you for being the best teacher a student could ever ask for. 

 thank you,                     

- A Fellow Student